Quantum pumping and rectification effects in Aharonov-Bohm-Casher ring-dot systems

Abstract

We study the time-dependent transport of charge and spin through a ring-shaped region sequentially coupled to a weakly interacting quantum dot in the presence of an Aharonov-Bohm flux and spin-orbit interaction. The time-dependent modulation of the spin-orbit interaction, or of the corresponding Aharonov-Casher flux, together with the modulation of the dot-level induces an electrically pumped spin current even in absence of a charge current. The results beyond the adiabatic regime show that an additional rectification current proportional to \cos(ϕ), being ϕthe relative phase between the time varying parameters, is generated. We discuss the relevance of such term in connection with recent experiments on out-of-equilibrium quantum dots.

10 pages, 7 figures;

References in corpus (4)

• Persistent current in ballistic mesoscopic rings with Rashba spin-orbit coupling
• Adiabatic pumping through interacting quantum dots
• Pumping in a mesoscopic ring with Ahronov-Casher effect
• The Aharonov-Bohm-Casher ring-dot as a flux-tunable resonant tunneling diode

Cited by in corpus (5)

• Single-parameter quantum charge and spin pumping in armchair graphene nanoribbons
• Polarized heat current generated by quantum pumping in two-dimensional topological insulators
• Relativistic electron transport through an oscillating barrier: wave packet generation and Fano-type resonances
• AC transport in carbon-based devices: challenges and perspectives
• Parasitic pumping currents in an interacting quantum dot